import 'package:flutter/material.dart';
import 'package:flutter/services.dart';


class ButtonPage extends StatelessWidget {
  final SystemUiOverlayStyle _style = SystemUiOverlayStyle(statusBarColor: Colors.transparent);
  @override
  Widget build(BuildContext context) {
    SystemChrome.setSystemUIOverlayStyle(_style);
    // TODO: implement build
    return MaterialApp(
      home: ButtonWidget(),
      theme: ThemeData(primarySwatch: Colors.yellow),
    );
  }
}

class ButtonWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return _ButtonPage();
  }
}

class _ButtonPage extends State<StatefulWidget> {

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Scaffold(
      appBar: AppBar(
        title: Text("Button Page"),
      ),
      body: SizedBox(
        height: 400,
        width: 200,
        child:Container(
          color: Colors.red,
        ),
      ),
    );
  }
}